1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gre4nikov [31]
3 years ago
14

How do you know how many valence electrons are in a molecule?

Chemistry
2 answers:
telo118 [61]3 years ago
4 0
1. by making a atomic configuration
2.by making a table of shells of k.l.m.n....
that's all
Leno4ka [110]3 years ago
4 0
To know the number of valence electrons you must know the number of electrons in the outer shell .. In the periodic table there are 8 groups (which are the vertical columns) .. ignore the yellow ones for now which are the transition metals .. the group number is the number of electrons in the most outer shell of an atom .. so for example lithium and sodium are in group 1 so they have only 1 electron in their outer shell .. the valence electrons are the ones an atom looses or gains during a chemical reaction (atoms try to be stable by having 8 electrons in their outer most shell) .. for example atoms in group 1 have 1 electron in their outer shell that they want to loose so the valency is 1 .. In group 5 they need to become 8 so they gain 3 electrons so the valency is 3

You might be interested in
Which formula correctly represents the composition of iron III oxide
nikitadnepr [17]
The answer to the question is- Fe2O3
6 0
2 years ago
What is the empirical formula of the compound that is 25.3% magnesium and 74.7% chlorine
Margarita [4]

Answer: MgCl_2

Explanation:

25.3% Mg

74.7% Cl

First step: change % to g

25.3g Mg

74.7g Cl

Second step: calculate g/mol of each compound. You can do this by using the atomic mass.

25.3gMg(\frac{1mol}{24.30g})=1.04mol

74.7gCl(\frac{1mol}{35.45g} )=2.11mol

Third step: determine the lowest number and divide everything by it. Of the result, extract whole number only.

Mg=\frac{1.04}{1.04} =1

Cl=\frac{2.11}{1.04}=2

Fourth step: Write each compound with their respective number below.

This empirical formula should be: MgCl_2

4 0
3 years ago
When a person in the hospital is given fluids intravenously, the fluid is typically a saline (salt) solution with about the same
Sati [7]

Answer:

Swelling of the red blood cells occurs.

Explanation:

  • <u>Distilled water makes the blood hypotonic ,. that is a less concentrated solution, to the body  tissues including  the red blood cells. </u>
  • Therefore the water will enter the red blood cells and may cause them to lyse or swell.
  • <em>Additionally , water will enter the tissue spaces and cause sweling. </em>
  • But in the case of a hypertonic solution , ( a salt or saline solution ) , <em>This swelling does not happen because the concentration of the saline will be equal or more than the blood. </em>
  • Thus the water will flow only from the blood to the solution. <u>This will not cause swelling.</u>
  • But too much of salt is also not recommended.
5 0
2 years ago
Oxygen, nitrogen, and carbon are all _____. metalloids nonmetals metals halogens
Radda [10]
They're all nonmetals
7 0
2 years ago
Read 2 more answers
Why is calcium carbonate used as a building material
VMariaS [17]
Because it is used for building - making concrete and cement - and the manufacture of glass, steel and iron. 
3 0
3 years ago
Read 2 more answers
Other questions:
  • What's the average atomic mass of bromine and state which isotope is more abundant?
    7·1 answer
  • Bullet Level, Measuring Tape, Ruler and Plum Bob are examples of what type of tools a.hammers b.wrenches c.layout tools d.pilers
    12·1 answer
  • What physical property makes metal pot good for cooking
    7·1 answer
  • What happens to an electron when it emits a photon
    15·1 answer
  • Atoms whose atomic number are the same but whose mass numbers are different are called: alpha particles ions beta particles isot
    7·1 answer
  • Glass of orange juice contain 0.90 dL of juice. How many milliliters of orange juice is that?
    14·1 answer
  • Which pH corresponds to the equivalence point for the graph below?
    14·1 answer
  • Calculate the molar mass:<br> CsC3H5O3
    12·1 answer
  • Pls help this a test for Google classroom
    10·1 answer
  • Why do whales absorb CO2?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!